The investigators regularly use AT in FM patients in our pain management unit to alleviate symptoms as pain, sleep disorders, anxiety. The investigators established a clinical trial in this population to assess impact of FM (assessed with Fibromyalgia Impact Questionnaire) following 3 months of AT management (Primary Outcome). Sleep disorder, fatigue, anxiety and depression, cognitive and physical dysfunction are also evaluated as secondary outcomes. The remnant effect of AT is also evaluated, 3 month after the end of the treatment by the same tests.